-9(2a+7)-5(4+5a)=

Solution for -9(2a+7)-5(4+5a)= equation:

Simplifying
-9(2a + 7) + -5(4 + 5a) = 0

Reorder the terms:
-9(7 + 2a) + -5(4 + 5a) = 0
(7 * -9 + 2a * -9) + -5(4 + 5a) = 0
(-63 + -18a) + -5(4 + 5a) = 0
-63 + -18a + (4 * -5 + 5a * -5) = 0
-63 + -18a + (-20 + -25a) = 0

Reorder the terms:
-63 + -20 + -18a + -25a = 0

Combine like terms: -63 + -20 = -83
-83 + -18a + -25a = 0

Combine like terms: -18a + -25a = -43a
-83 + -43a = 0

Solving
-83 + -43a = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '83' to each side of the equation.
-83 + 83 + -43a = 0 + 83

Combine like terms: -83 + 83 = 0
0 + -43a = 0 + 83
-43a = 0 + 83

Combine like terms: 0 + 83 = 83
-43a = 83

Divide each side by '-43'.
a = -1.930232558

Simplifying
a = -1.930232558